feat: add Turbo0 listing badge to home page

- Include a link to the Turbo0 webpage
- Add an image badge indicating the listing

This change enhances the visibility of the listing
for the application on Turbo0, promoting user
engagement and providing proof of the application's
presence on external platforms.

app/views/home/index.html.erb

@@ -69,5 +69,9 @@
         class="max-w-full h-auto"
         />
     </a>
+
+    <a href="https://turbo0.com/item/today-ai-weather" target="_blank" rel="noopener noreferrer">
+      <img src="https://img.turbo0.com/badge-listed-light.svg" alt="Listed on Turbo0" style="height: 60px; width: auto;" />
+    </a>
   </div>
 </div>